I just tried the site on an iPhone browser, and 14px seems best to me. I wouldn't use anything smaller.

If you really want to get that tricky, try using a @media in your style sheet to use 13px for desktop, and 14px for mobile. Or keep it simple and stick with 14px and that seems readable on everything I just tested. 14px seems a good compromise for all displays.

pdath: So I guess if enough people are unhappy with the size you could copy Google (who I am sure have a whole team of usability researchers who study the tiniest of details like this one) and go with 13px.

I wouldn't be surprised if the final decision was one person's preference. Human behaviour being what it is, techs put in their preference or a manager/administrator wants to make a decision.

Some of you may remember the days before PCL5 (the 1980s) when the default LaserJet font sizes were all even point sizes. Whenever the even-numbers were questioned because, for example, 11pt was more useful than 10pt, we were told that the HP engineers preferred even numbers.

in Linux (openSUSE) there doesn't appear to be any difference whatsoever for the posts. (although I always thought geekzone forum looked much better in linux than windows so it's good there is no change)The signatures and user info (left column) appear to be overly large though.This is consistent in both chrome / chromium / firefox

pdath: I just tried the site on an iPhone browser, and 14px seems best to me. I wouldn't use anything smaller.

If you really want to get that tricky, try using a @media in your style sheet to use 13px for desktop, and 14px for mobile. Or keep it simple and stick with 14px and that seems readable on everything I just tested. 14px seems a good compromise for all displays.

farcus: in Linux (openSUSE) there doesn't appear to be any difference whatsoever for the posts. (although I always thought geekzone forum looked much better in linux than windows so it's good there is no change)The signatures and user info (left column) appear to be overly large though.This is consistent in both chrome / chromium / firefox

...I have been toying with the idea of removing the mobile Geekzone site and replacing with the main site, but to do that have to change to a responsive design.

We already have something in place - if you visit the main site on mobile we don't show the sidebar in forum pages and hide the square ads, only leaving the leaderboard ones.

I've just recently converted our companies web site across to being responsive. Assuming the sections that don't get displayed on a mobile site are in "div", it is as easy as marking those section as "hidden" for devices with small screens in the CSS.